Projects - How to Quickly and Easily Insulate a Crawlspace

Last year, I paid a professional spray foam company $9,000 to spray parts of my home. This year, I sprayed two 602 AM kits on the ceiling and rim joists of the crawl space. It was a piece of cake and a big success! - Eileen F., NJ

Use Closed Cell Foam it Green for Insulating a Crawlspace

Insulating crawlspace with Foam it Green is quick and easy to do. Plus the benefits range from much lower utility bills to reduced sound transfer.

By using Closed Cell Foam it Green, you create a seamless air barrier and high r-value that will keep your home much warmer in the winter and cooler in the summer.

The rigid foam creates a pest barrier that helps keep insects, rodents, and even radon gas out. And because it never sags nor settles, once it's in place, it's done, unlike fiberglass. Plus, you avoid common mold issues with our antimicrobial formula.

1) Follow all of the instructions in the included instruction manual regarding proper Foam it Green setup, project area preparation, and substrate readiness. Make sure that you have all of the tools required for the job. (see Tools)

2) Make sure subfloor surface is dry, broom clean, and in the correct temperature range.

CEILING/UNDER FLOOR:1) Apply closed cell foam to achieve 1” cured layers to desired thickness, sprayed directly to the subfloor bays, making sure the foam is applied to the joints connecting the joists to the substrate. (Fig. 1A-B)

2) Continue adding layers to desired thickness, sprayed directly to the rim joist bay, connecting any seams at the sill plate up to the subfloor. (Fig. 1B-D)

CRAWLSPACE WALLS:1) If installing polyethylene sheeting on the floor of the crawlspace, only run the sheet up the foundation wall a few inches. Use the closed cell spray foam to adhere the lip of the sheet to the wall, by spraying over it. (Fig. 2A)

Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r-value in just 1 inch. Choose Foam It Green spray foam insulation kits and don't settle for less than you deserve.